Shaft turning machine



(No Model.) 3 Sheets-Sheet 1.

L. H. BRIGHTMAN.

SHAFT TURNING MACHINE.

180.48882. Patented 81115728, 1891.

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INVENTUR Ma/ru (No Model.) 8 sheets-'sheet 8. y

` L. H. BRIGHTMAN.-

SHAFT TURNING MACHINE.

No. 458,882. Patented July 28, 1891.

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PATENT OFFICE.

LATHAM H. BRIGHTMAN, OF CLEVELAND, OHIO, ASSIGNO-R TO THE BRIGHTMAN MACHINE COMPANY, OF SAME PLACE.

SHAFT-TURNING MACHINE.

SPECIFICATION forming part of Letters Patent No. 456,882, dated July 28, 1891.

Application led February 6, 1891. Serial No. 380,465. (No model.)

To all whom t may concern,.-

Be it known that I, LATHAM H. BRIGHTMAN, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented certain new and useful Improvements in Shaft-Turning Machines, of

. which the following' is a specification, the

principle of the invention being herein explained and the best mode in which I have contemplated applying thatl principle so as to distinguish it from other inventions.

The objects of my invention are to pro- Vide improved means for rough-turning and iinishing the work at one operation in a machine for turning shafts and other cylindrical objects of metal having rotary heads; to provide improved means for evenly turning curved or crooked portions of the Work; to provide improved means for supporting the work in the rotary heads; to provide improved means for adjusting the feeding-rollers for the work; to provide improved means for adjustably securing the cutters and steady-rests in the revolving heads, and to provide an efiicient and compact machine for turning shafts or other cylindrical objects in such a manner that they will requirebut little tinishing or smoothing after leaving the machine.

In the accompanying drawings, Figure l represents a side elevation of my improved shaft-turning machine; Fig. 2, a longitudinal vertical section of the same; Fig. 3, a top plan View; Fig. 4, a front View of one of the cutting and supporting heads; Fig. 5, an aX- ial section of the double yoke and its heads; Fig. (5 a transverse vertical section of the shaft-feeding mechanism; Figs. 7 and S, aX- ial sections, taken at right angles, of one of the shaft-feeding rollers audits shaft; and Fig.

9, an end view of one of the shaft-supporting clamps, showing the guides for the same in vertical cross-section. j

In said drawings, the letter A indicates the bed or main frame of the machine, upon the middle of which are supported two longitudinal bearings B B, in which atubular spindle C is journaled. Said spindle has a cog-Wheel O secured upon it, which meshes with apinion D upon the power-shaft D, which is revolved by a belt passing around the powerpulleys D2 upon said shaft or by other suitable gearing. A double yoke E is secured upon one end of said spindle and a single yoke E is secured upon the other end of the spindle. The double yoke E is composed of three annular disks or rings e, e', and e2, the inner one e of which is secured to the end of the tubular spindle,while the outer disks eaud e2 are separated from and connected to the inner disk and each other by means of short arms e3, projecting diametrically opposite to eachother f rom the faces of the inner and intermediate disks e and e. The single yoke E is composed of two annular disks e4 and e5, the inner one e4 of which is secured to the rear end of the tubular spindle, while the outer disk e is supported from said inner disk by two diametrically-opposite projecting arms eb'. A disk or head F for rough-turning the shaft is secured upon the outer disk e2 by means of boltsf, and has an annular ange f', which tits into the central opening of said outer disk. Said head is formed witha number of radiating ribs f2 upon its outer face, which have radiating grooves fi", of the same depth as the ribs. Steady-restsfl, which are formed by flat metal bars, are placed in all but one of said grooves, and a cutting-tool f5 is placed in the remain.- ing groove. The stead y-rests and the cuttingtool are confined in the grooves by Washers f upon screw-bolts f 7, which enter the faces of the ribs and force the washers, which overlap the faces of the steady-rests and cuttingtool, against the same. Screw-bolts f8 pass through the outer ends of the ribs into the grooves, and bear against the outer ends of the steady-rests and cutting-tool, serving to adj ust the same against the shaft to be turned, said steady-rests being adjusted to just bear against the shaft, and said cutting-tool being adjusted to rough-turn or cut the shaft. A similar disk or head F is secured upon the intermediate disk e' and has ribs f2, grooves fi, washers and boltsf'6 ff/"S, steady-rests f4, and a cutter f5 exactly similar' to the outer head, but has no fiange at its central opening. Said head is secured to the face of the intermediate disk by means of screw-bolts fg, which pass into the disk through holes f 10 in IOO the head, of a greater diameter than said bolts, so that the head may have a moderate degree of play upon the diskA Another simllar disk or head f2 of exactly the same construction as the head F is secured upon the disk e5 of the yoke E', and has steady-rests and a cutting-tool similar to the steady-rests and cutting-tools of theouter heads.

Two H-shaped frames G are transversely secured with the ends of their longitudinallyslotted bars g to upright plates H' upon the bed-frame, and have slots g in their bars g longitudinal tothe bars and transverse to the frame. Two pairs of blocks g2, having flanges g3 overlapping'the edges of the slots, slide in said slots, have vertical bearings g4, and may be adjusted in the slots by means of adjusting-screws g5 beari-ng against them and inserted through the ends of the slotted bars.

Vertical shafts I are journaled in the bearing-blocks g2 g4, and are provided with sprocket-wheels upon their middles at points between the H-shaped frames. Two sprocket-chains t" pass each around one pair of sprocket wheels, connecting the shafts at each side of the machine7 and one shaft of each pair has a worm-wheel i2 upon its lower cndwhich is engaged by one of two right and left handed worms t3 upon a worm-shaft fit, transversely journaled in the bed-frame beneath the H-shaped frames. Aworm-wheel i5 is secured upon the end of said worin-shaft and is engaged by a worm j upon a shaft J, longitudinally journaled upon the side of the bed-frame and revolved from the power-shaft by a beltj, passed around one step of a conepulley i2 upon the longitudinal worm-shaft and one step of a conc-pulley d upon the power-shaft.

The upper ends of the vertical shafts I have feathers, keys, or splines G and axial screw-threaded bores if, and the feed rollers or wheels K, having V-sha-ped or round peripheral grooves 7s, lit and are vertically movable upon said upper ends, having grooves 7c in their central bores to fit upon said feathers. The feed-rollers are formed with yokes K, which straddle over the central bores and the ends of the shafts, and said yokes have holes k2 in their upper ends, open at one side, in which holes screw-bolts K2 lit and turn, having heads 7c3 upon their upper ends and collars 7a4 below said heads, and having their screw-threaded ends fitting and turning in the screw-threaded axial bores of the shafts. Said bolts fit in the holes of the yokes with their heads above and their collars below the same, so that they may revolve in said holes and adjust the rollers up and down upon the shafts, and the open sides of the holes inthe yokes admit of the bolts being freely and easily inserted or removed.

Longitudinal guide-rails L are supported at both ends of the bed-frame in the axial plane of the spindle, and turning heads upon suitable upright brackets L and clampframes M,fhaving two pairs of oppositely-projecting lips or flanges fm, which slide upon the upper guide-rail, and foot-flanges m,which slide upon the lower rail, may be longitudinally slid upon said guide-rails. The upper portions of said frames are formed with two vertically-opposite sockets m2 and m3, in the lower one m3 of which a jaw m4, having a V- shaped notch, is adjusted by means of ascrew m5, inserted through the bottom of said socket. A similarly.V-shape-notched jaw m6 is inserted in the upper socket and is vertically adjusted by a screw m7 and hand-wheel m8.

In practice the round bar o r shaft N is secured in the sliding clamp-frame M at the forward end of the machine and is inserted between the feed-rollers. The jaws of the clampframe have been so adjusted by means of their adj Listing-screws' as to exactly center the shaft in the cutter-heads and in the spindle. The feed-rollers have also been so adjusted vertically by means of the screws K2 and yokes K', and horizontally by means of the screws g5, that the shaft will be centered to the cutters and will be firmly gripped by them. When now the machine is started, the feed-rollerswill feed the shaft into the first head, which Will rough-turn it, the cutter being adjusted to just remove the most prominent irregularities. The shaft then passes to the second head, the cutter of which is so adjusted as to Inearly finish the shaft, and which has sufficient play by means of its enlarged bolt-holes f10 to yield to and follow any curves existing in the shaft, so that the shaft will be turned round in relation to its axis, regardless of curvatures in the same. From the second head the shaft passes to the finishing-head at the rear end of the spindle, which will turn the shaft smooth, ready for the straightening and polishing machine. After leaving the rear cutter-head the shaft is supported by the rear sliding clamp-frame M, so that the shaft will be firmly and truly centrally' supported. The feed of the shaft may be regulated by shifting the belt j upon the cone-pulleys, and on account of the feedrollers having V-shaped or rounded grooves and being laterally adjustable the machine may turn shafts of any diameter within the capacity of the machine.

As the cutters and steady-rests are secured in grooves in the heads, open in front, it is obvious that repairs of said cutters andsteadyrests may take place without removing the heads; but by simply unscrewing the screwbolt which holds the washer against the cutter or steady-rest to be removed said part may be removed, another put in its place,.

and the screw-bolt and washer again forced against it.

In this machine the shaft will be roughturned and finished in one operation, ready for the straightening and smoothing or .polishing machine, and will be turned into a truly-cylindrical shape around its true axis without regard to curvatures which may exist in the shaft. This is accomplished by having IOO IIO

dit

the inner or intermediate head yielding` or universally movable to a limited extent in a vplane transverse to the axis of the shaft'to be 4turned and could not be accomplished by a machine having rigid heads, as in such 1na chine the cutter would remove material from the convex sides of the cnrvatures and thus leave the shafts irregular in cross-sections.

The foregoing description and accompanying drawings set forth in detail mechanism embodying my invention. made therein provided the principles of construction respectively recited in the following claims are employed.

' I therefore particularly point out and distinctly claim as my inventionl. In a shaft-turning machine, the combination, with a revolving lathe-head, of a'cutter-head loosely secured upon one face of said lathe-head self-adjustable in the plane of said face, substantially as set forth.

2. In a shaft-turning machine, the combination, with a revolving lathe-head, of a plurality of cutter-heads upon the same, one of said cutter-heads being self-adjustable in a plane at right angles to the axis of the lathehead, substantially as set forth.

3. In a shaft-turning machine, the combination, with a revolving annular disk, of a cutter-head upon the face of said disk formed with enlarged bolt-holes, and screw-bolts of less diameter than said holes inserted through said holes into said disk, substantially as set forth.

4. In a shaft-turning machine, the combination, with three revolving annular disks arranged in axial alignment, of cutter-heads rigidly secured to the two outer heads, and a Change may be said holes inserted through said holes into said middle disk, substantially as set forth.

6. In a shaft-turning machine, the combination, with a vertical feed-roller shaft Vhaving an axial screw-threaded bore in its upper end, of a feed-roller sliding upon and turning with said shaft and provided with ,a yoke straddling the end of said shaft, and a screw turning in said yoke and fitting in the axial bore of the shaft, substantially as set fort-h.

7. In a shaft-turning machine, the combination, with a vertical feed-roller shaft provided with a feather and with an axial bore in its upper end, of a feed-roller sliding upon said shaft and feather and formed with a yoke straddling the upper end of the shaft and having a hole in its upper end open at one side, and ascreW-bolt in said hole and in the screw-threaded bore of the shaft and having a head and a collar respectively above and below said hole, substantially as set forth.

In testimony that I claim the foregoing to be my invention I have hereto set my hand this 23d day of December, 'A. D. 1890.

LA'uiAM H. BRIGHTMANJ `Witnesses:

J. B. FAY, WM. SECHER. 

